on the streets of benghazi, two very different feelings. here, demonstrators burn an american flag in protests to the internet video they say insults islam. but across town, the others denounce the terrorism. they support the united states and their ambassador, chris stevens, who was a support system. >> he was an excellent diplomat, and really cared about the people and the future of libya. >> reporter: days after the attack, the consulate still smolders, and the ambassador was rushed to a nearby hospital where doctors tried to help him. >> there was difficulty with his air ways, 20 minutes later, we pronounced his death. >> reporter: today, there was an emotional scene after the attack, as the government is convinced it was a pre-planned assault and is conducting investigations. so was the fbi. a team of agents arrived in benghazi today to sift through the ashes and look for clues. before arriving here, the fbi spent hours interviewing witnesses and victims evacuated to germany. they are also receiving cooperation from the libyan governme